Infant booster chair



FIG. 1 is a perspective view of the infant booster chair showing my new design;

FIG. 2 is a top plan view on an enlarged scale;

FIG. 3 is a front end elevational view;

FIG. 4 is a side elevational view, the opposite side view being a mirror image;

FIG. 5 is a rear end elevational view; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for an infant booster chair, as shown and described. 